At Rest, Neurons Exhibit a Negative Membrane Potential

At rest, neurons exhibit a negative membrane potential. This is most DIRECTLY due to

A) movements of negatively charged proteins and nucleic acids across the membrane.
B) passive leakage of Na⁺ions across the membrane.
C) passive leakage of K⁺ions across the membrane.
D) movement of Na⁺ ions through voltage-gated Na+ channels.
E) movement of K⁺ ions through voltage-gated K+ channels.